How to balance one or two wheel vehicles?

[AchimTuran]

Hello everyone,

I'm currently trying to learn how to create two wheel vehicles with PhysX. The documentation mentions that it is possible to disabled the unused wheels.
https://gameworksdocs.nvidia.com/PhysX/4.0/documentation/PhysXGuide/Manual/Vehicles.html?highlight=balance#threewheeled

Further wheels could in theory be removed with custom code to create a vehicle with 1 or 2 effective wheels. At that point, however, extra balancing code would be required to prevent the vehicle falling over.

Does someone know where I can find more information about the mentioned balancing code or technique? I think some forces need to be applied but I currently don't know how I would have to do that.